Barndoor NGC2244 (#1) : 無料・フリー素材/写真
Barndoor NGC2244 (#1) / s58y
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Subject: NGC2244 -- Rosette NebulaImage FOV: 2.5 degrees square (150 arc-minutes square)Image scale: 10 arc-seconds per pixelDate: 2005/10/29 - 2006/01/28Exposure: 224 x 2min = 7h28m, ISO400, f/2.8Filter: IDAS LPSCamera: Canon 20D (unmodified)Lens: Nikon 300mm f/2.8 AISMount: Single-arm motorized barndoor tracker, unguided Processing: Subexposures were registered and combined using Registar. Dark frames were used for each night, but no flat frames or bias frames were taken. Postprocessing in PhotoShop involved levels and curves, cropping, resizing, JPEG conversion |
| 撮影日 | 2009-11-27 18:03:16 |
| 撮影者 | s58y |
| タグ | |
| 撮影地 |